[Motorola] HT440 questions

[ersmar at comcast.net]

Gents:

     I just acquired a ^^ HT440 with speaker/mike and battery, all in 
apparent good condition.  Two questions for you:

1.     What is the proper charger I need for this rig's batt?  (Full model 
number is H34LCU6124A.)

2.    When I powered the unit from an external 12 VDC source via clip leads 
to the chassis, I heard a motoboating sort of sound from the speaker/mike. 
The sound disappeared when I removed the mike.  What might be the cause or 
is this normal?

     Thanks for any help.

73 de
Gene Smar  AD3F